我有此对象数组,需要对其进行修改以使其更容易呈现.
const items = [
{
tab: 'Results',
section: '2017',
title: 'Full year Results',
description: 'Something here',
},
{
tab: 'Results',
section: '2017',
title: 'Half year Results',
description: 'Something here',
},
{
tab: 'Reports',
section: 'Marketing',
title: 'First Report',
description: 'Something here',
},
...
];
我正在尝试对其进行修改,并按特定的键对它们进行分组.这个想法是要有这个输出.如您所见,键的名称可能与项目中的实际名称不同.我认为这与以前的帖子有些不同.
const output = [
{
tab: 'Results',
sections: [
{
section: '2017',
items: [ { 'item that belongs here' }, { ... } ],
},
},
{
tab: 'Reports',
sections: [
{
section: 'Marketing',
items: [ { ... }, { ... } ],
},
},
...
]
我尝试使用lodash.groupby,但是它并不能完全满足我的需求.
关于如何处理它的任何想法?
非常感谢!!
解决方法:
可以通过_.map和_.groupBy的巧妙组合来完成.
const items = [
{
tab: 'Results',
section: '2017',
title: 'Full year Results',
description: 'Something here',
},
{
tab: 'Results',
section: '2017',
title: 'Half year Results',
description: 'Something here',
},
{
tab: 'Reports',
section: 'Marketing',
title: 'First Report',
description: 'Something here',
}
];
function groupAndMap(items, itemKey, childKey, predic){
return _.map(_.groupBy(items,itemKey), (obj,key) => ({
[itemKey]: key,
[childKey]: (predic && predic(obj)) || obj
}));
}
var result = groupAndMap(items,"tab","sections",
arr => groupAndMap(arr,"section", "items"));
console.log(result);
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>